| Tail Number / N-Number | N51DU |
| Manufacturer | UHLENBERG DONALD M |
| Model | GREAT LAKES 2T1A |
| Year Built | 1988 |
| Manufacturer's Serial Number | 7125-H519 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | O&VO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | OKEEFE WILLIAM G |
| Street | 3721 SIMONVIEW CT |
| City | GRAND FORKS |
| State | ND |
| Zip Code | 58201-7611 |
| Region | Great Lakes |
| County | Grand Forks County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1988-09-01 |
| Certificate Issue Date | 2008-09-05 |
| Last Action Date | 2021-01-22 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 51457564 |
| Mode S Code Hex | A65F74 |